1 files changed, 288 insertions, 0 deletions
diff --git a/src/gprs/gb_proxy_main.c b/src/gprs/gb_proxy_main.c
new file mode 100644
index 000000000..b53e98579
--- /dev/null
+++ b/src/gprs/gb_proxy_main.c
@@ -0,0 +1,288 @@
+/* NS-over-IP proxy */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/select.h>
+#include <osmocore/rate_ctr.h>
+#include <osmocore/process.h>
+
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/vty.h>
+#include <openbsc/gb_proxy.h>
+
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/telnet_interface.h>
+
+#include "../../bscconfig.h"
+
+/* this is here for the vty... it will never be called */
+void subscr_put() { abort(); }
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+void *tall_bsc_ctx;
+
+const char *openbsc_copyright =
+	"Copyright (C) 2010 Harald Welte and On-Waves\r\n"
+	"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
+	"This is free software: you are free to change and redistribute it.\r\n"
+	"There is NO WARRANTY, to the extent permitted by law.\r\n";
+
+static struct log_target *stderr_target;
+static char *config_file = "osmo_gbproxy.cfg";
+struct gbproxy_config gbcfg;
+static int daemonize = 0;
+
+/* Pointer to the SGSN peer */
+extern struct gbprox_peer *gbprox_peer_sgsn;
+
+/* call-back function for the NS protocol */
+static int proxy_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+		      struct msgb *msg, u_int16_t bvci)
+{
+	int rc = 0;
+
+	switch (event) {
+	case GPRS_NS_EVT_UNIT_DATA:
+		rc = gbprox_rcvmsg(msg, nsvc, bvci);
+		break;
+	default:
+		LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
+		if (msg)
+			talloc_free(msg);
+		rc = -EIO;
+		break;
+	}
+	return rc;
+}
+
+static void signal_handler(int signal)
+{
+	fprintf(stdout, "signal %u received\n", signal);
+
+	switch (signal) {
+	case SIGINT:
+		dispatch_signal(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
+		sleep(1);
+		exit(0);
+		break;
+	case SIGABRT:
+		/* in case of abort, we want to obtain a talloc report
+		 * and then return to the caller, who will abort the process */
+	case SIGUSR1:
+		talloc_report(tall_vty_ctx, stderr);
+		talloc_report_full(tall_bsc_ctx, stderr);
+		break;
+	case SIGUSR2:
+		talloc_report_full(tall_vty_ctx, stderr);
+		break;
+	default:
+		break;
+	}
+}
+
+static void print_usage()
+{
+	printf("Usage: bsc_hack\n");
+}
+
+static void print_help()
+{
+	printf("  Some useful help...\n");
+	printf("  -h --help this text\n");
+	printf("  -d option --debug=DNS:DGPRS,0:0 enable debugging\n");
+	printf("  -D --daemonize Fork the process into a background daemon\n");
+	printf("  -c --config-file filename The config file to use.\n");
+	printf("  -s --disable-color\n");
+	printf("  -T --timestamp Prefix every log line with a timestamp\n");
+	printf("  -V --version. Print the version of OpenBSC.\n");
+	printf("  -e --log-level number. Set a global loglevel.\n");
+}
+
+static void handle_options(int argc, char **argv)
+{
+	while (1) {
+		int option_index = 0, c;
+		static struct option long_options[] = {
+			{ "help", 0, 0, 'h' },
+			{ "debug", 1, 0, 'd' },
+			{ "daemonize", 0, 0, 'D' },
+			{ "config-file", 1, 0, 'c' },
+			{ "disable-color", 0, 0, 's' },
+			{ "timestamp", 0, 0, 'T' },
+			{ "version", 0, 0, 'V' },
+			{ "log-level", 1, 0, 'e' },
+			{ 0, 0, 0, 0 }
+		};
+
+		c = getopt_long(argc, argv, "hd:Dc:sTVe:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			print_usage();
+			print_help();
+			exit(0);
+		case 's':
+			log_set_use_color(stderr_target, 0);
+			break;
+		case 'd':
+			log_parse_category_mask(stderr_target, optarg);
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'c':
+			config_file = strdup(optarg);
+			break;
+		case 'T':
+			log_set_print_timestamp(stderr_target, 1);
+			break;
+		case 'e':
+			log_set_log_level(stderr_target, atoi(optarg));
+			break;
+		case 'V':
+			print_version(1);
+			exit(0);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+extern void *tall_msgb_ctx;
+
+extern enum node_type bsc_vty_go_parent(struct vty *vty);
+
+static struct vty_app_info vty_info = {
+	.name 		= "OsmoGbProxy",
+	.version	= PACKAGE_VERSION,
+	.go_parent_cb	= bsc_vty_go_parent,
+	.is_config_node	= bsc_vty_is_config_node,
+};
+
+int main(int argc, char **argv)
+{
+	struct gsm_network dummy_network;
+	int rc;
+
+	tall_bsc_ctx = talloc_named_const(NULL, 0, "nsip_proxy");
+	tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb");
+
+	signal(SIGINT, &signal_handler);
+	signal(SIGABRT, &signal_handler);
+	signal(SIGUSR1, &signal_handler);
+	signal(SIGUSR2, &signal_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	log_init(&log_info);
+	stderr_target = log_target_create_stderr();
+	log_add_target(stderr_target);
+	log_set_all_filter(stderr_target, 1);
+
+	vty_info.copyright = openbsc_copyright;
+	vty_init(&vty_info);
+	logging_vty_add_cmds();
+	gbproxy_vty_init();
+
+	handle_options(argc, argv);
+
+	rate_ctr_init(tall_bsc_ctx);
+
+	rc = telnet_init(tall_bsc_ctx, &dummy_network, 4246);
+	if (rc < 0)
+		exit(1);
+
+	bssgp_nsi = gprs_ns_instantiate(&proxy_ns_cb);
+	if (!bssgp_nsi) {
+		LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
+		exit(1);
+	}
+	gbcfg.nsi = bssgp_nsi;
+	gprs_ns_vty_init(bssgp_nsi);
+	register_signal_handler(SS_NS, &gbprox_signal, NULL);
+
+	rc = gbproxy_parse_config(config_file, &gbcfg);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
+		exit(2);
+	}
+
+	if (!nsvc_by_nsei(gbcfg.nsi, gbcfg.nsip_sgsn_nsei)) {
+		LOGP(DGPRS, LOGL_FATAL, "You cannot proxy to NSEI %u "
+			"without creating that NSEI before\n",
+			gbcfg.nsip_sgsn_nsei);
+		exit(2);
+	}
+
+	rc = gprs_ns_nsip_listen(bssgp_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
+		exit(2);
+	}
+
+	rc = gprs_ns_frgre_listen(bssgp_nsi);
+	if (rc < 0) {
+		LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE "
+			"socket. Do you have CAP_NET_RAW?\n");
+		exit(2);
+	}
+
+	if (daemonize) {
+		rc = osmo_daemonize();
+		if (rc < 0) {
+			perror("Error during daemonize");
+			exit(1);
+		}
+	}
+
+	/* Reset all the persistent NS-VCs that we've read from the config */
+	gbprox_reset_persistent_nsvcs(bssgp_nsi);
+
+	while (1) {
+		rc = bsc_select_main(0);
+		if (rc < 0)
+			exit(3);
+	}
+
+	exit(0);
+}